Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065, USA.
Laboratoire d'Ingénierie des Systèmes Macromoléculaires, CNRS - Aix Marseille Université, 31 Chemin Joseph Aiguier, 13402 Marseille, France.
STAR Protoc. 2024 Sep 20;5(3):103240. doi: 10.1016/j.xpro.2024.103240. Epub 2024 Aug 9.
The voltage-dependent anion channel (VDAC) is an abundant and multifunctional outer mitochondrial membrane protein, playing key roles in neurodegeneration, apoptosis, and mitochondrial membrane biogenesis. Here, we present a protocol to produce and reconstitute high yields of detergent-solubilized VDAC, expressed as inclusion bodies in E. coli. We describe steps for purification by affinity chromatography and refolding in lauryldimethylamine-N-oxide (LDAO). We then detail procedures for reconstituting VDAC into membrane vesicles to assay its channel and phospholipid scramblase activity via fluorescence-based assays. For complete details on the use and execution of this protocol, please refer to Bergdoll et al., Queralt-Martín et al., and Jahn et al..
电压依赖性阴离子通道(VDAC)是一种丰富且多功能的线粒体膜蛋白,在神经退行性变、细胞凋亡和线粒体膜生物发生中发挥关键作用。在这里,我们提供了一个生产和重组成纤维菌表达的包涵体形式的 VDAC 的方案,该蛋白在去污剂中具有高产量可溶性。我们描述了通过亲和层析进行纯化和在月桂基二甲基氧化胺(LDAO)中进行复性的步骤。然后,我们详细介绍了将 VDAC 重新组装到膜泡中以通过荧光测定法测定其通道和磷脂翻转酶活性的程序。有关此方案的使用和执行的完整详细信息,请参阅 Bergdoll 等人、Queralt-Martín 等人和 Jahn 等人的研究。